THREATPORT/VULNERABILITY/CVE-2018-0739
MEDIUM SEVERITY

CVE-2018-0739

Openssl vulnerability

CVSS
6.5
EPSS
19.3%
EPSS pct
97th
Exploited
No known
Constructed ASN.1 types with a recursive definition (such as can be found in PKCS7) could eventually exceed the stack given malicious input with excessive recursion. This could result in a Denial Of Service attack. There are no such structures used within SSL/TLS that come from untrusted sources so this is considered safe. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g). Fixed in OpenSSL 1.0.2o (Affected 1.0.2b-1.0.2n).
Affected vendor
Openssl
Affected product
Openssl
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness type (CWE)
Published
2018-03-27

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 19.3% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 97% of all scored CVEs.

Check your external exposure to CVE-2018-0739

  • Confirm whether Openssl Openssl is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2018-0739.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2018-0739

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2018-0739 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

Run a free external exposure scan

Are you exposed to CVE-2018-0739?

Run an instant, non-intrusive external scan to check your attack surface for CVE-2018-0739.

Start free scan

No credit card. Agentless.

Related vulnerabilities

MEDIUM
CVE-2011-4044
Frontvue vulnerability
MEDIUM
CVE-2011-4045
Frontvue vulnerability
MEDIUM
CVE-2011-4535
Turbopower Abbrevia vulnerability